The bureaucrats at the Organization for Economic Cooperation and Development threatened to have me thrown in a Mexican jail for the horrible crime of standing in the public lobby of a hotel and giving advice to low-tax jurisdictions.

But if that makes it seem as if the battle is full of drama and (exaggerated) glory, that would be a gross exaggeration. More than 99 percent of my time on this issue is consumed by the difficult task of trying to convince policy makers that tax competition, fiscal sovereignty, and financial privacy should be celebrated rather than persecuted.

Sort of like convincing thieves that it’s a good idea for houses to have alarm systems.

And it means I’m also condemned to the never-ending chore of debunking left-wing attacks on tax havens. The big-government crowd viscerally despises these jurisdictions because tax competition threatens the ability of politicians to engage in class warfare/redistribution policies.

To determine whether tax havens are immoral, let’s peruse Mr. Vallely’s column. It begins with an attack on Ugland House in the Cayman Islands.

There is a building in the Cayman Islands that is home to 12,000 corporations. It must be a very big building. Or a very big tax scam.

If lying is immoral, this is a quick black mark on Mr. Vallely rather than tax havens. I’ve already explained, in a post eviscerating an empty-suit Senator from North Dakota, that a company’s home is merely the place where it is chartered for legal purposes. A firm’s legal domicile has nothing to do with where it does business or where it is headquartered.

Now that we’ve established that the author is a careless and know-nothing hack, let’s see what else he has to say.

Are there any legitimate reasons why anyone would want to have a secret bank account – and pay a premium to maintain their anonymity – or move their money to one of the pink dots on the map which are the final remnants of the British empire: the Caymans, Bermuda, the Turks and Caicos and the British Virgin Islands?

As this video explains, there are billions of people around the world that are subject to state-sanctioned (or at least state-permitted) religious, ethnic, racial, political, sexual, and economic persecution. These people are especially likely to be targeted if they have any money, so the ability to invest their assets offshore and keep that information hidden from venal governments can, in some cases, be a life-or-death matter.

And let’s not forget the residents of failed states, where crime, expropriation, kidnapping, corruption, extortion, and economic mismanagement are ubiquitous. These people also need havens where they can safely and confidentially invest their money.

The author of the column is probably oblivious to these practical, real-world concerns. Instead, he is content with sweeping proclamations.

But if he is against unfairness, cheating, and injustice, why does he want to empower the institution – government – that is the source of oppression in the world?

To be fair, our left-wing friend does attempt to address the other side of the argument.

Apologists insist that tax havens protect individual liberty. They promote the accumulation of capital, fair competition between nations and better tax law elsewhere in the world. They also foster economic growth. …Yet even if all that were true – and it is not – does it outweigh the ethical harm they do? The numbered bank accounts of tax havens are notoriously sanctuaries for the spoils of theft, fraud, bribery, terrorism, drug-dealing, illegal betting, money-laundering and plunder by Arab despots such as Gaddafi, Mubarak and Ben Ali, all of whom had Swiss accounts frozen.

But he can’t resist trying to discredit the economic argument by resorting to more demagoguery, asserting that tax havens are shadowy regimes. Not surprisingly, he offers no supporting data. Moreover, you won’t be surprised to learn that the real-world evidence directly contradicts what he wrote. The most comprehensive analysis of dirty money finds 28 problem jurisdictions, and only one could be considered a tax haven.

Last but not least, the author addresses the issue that really motivates the left – the potential loss of access to other people’s money, funds that they want the government to confiscate and redistribute.

Christian Aid reckons that tax dodging costs developing countries at least $160bn a year – far more than they receive in aid. The US research centre Integrity estimated that more than $1.2trn drained out of poor countries illicitly in 2008 alone. …Some say an attack on tax havens is an attack on wealth creation. It is no such thing. It is a demand for the good functioning of capitalism, balancing the demands of efficiency and of justice, and placing a value on social harmony.

Let’s now shift from the inaccurate ramblings of a left-winger to some real-world evidence. The Wall Street Journal has an article on the Canton of Zug, Switzerland’s tax haven within a tax haven. This hopefully won’t surprise anyone, but low-tax policies have been very beneficial for Zug.

Developed nations from Japan to America are desperate for growth, but this tiny lake-filled Swiss canton is wrestling with a different problem: too much of it. Zug’s history of rock-bottom tax rates, for individuals and corporations alike, has brought it an A-list of multinational businesses. Luxury shops abound, government coffers are flush, and there are so many jobs that employers sometimes have a hard time finding people to fill them. …If Switzerland is the world’s most famous tax haven, Zug amounts to a haven within a haven.

Here’s some of the evidence of how better fiscal policy promotes prosperity. This is economic data, to be sure, but isn’t the choice between growth and stagnation also a moral issue?

Zug long was a poor farming region, but in 1947 its leaders began to trim tax rates in an effort to attract companies and the well-heeled. In Switzerland, two-thirds of total taxes, including individual and corporate income taxes, are levied by the cantons, not the central government. The cantons also wield other powers that enable them compete for business, such as the authority to make residency and building permits easy to get. …businesses moved in, many establishing regional headquarters. Over the past decade, the number of companies with operations of some sort in the canton jumped to 30,000 from 19,000. The number of jobs in Zug rose 20% in six years, driven by the economic boom and foreign companies’ efforts to minimize their taxes. At a time when the unemployment rate in the European Union (to which Switzerland doesn’t belong) is 9.4%, Zug’s is 1.9%.

It turns out that Zug is growing so fast that lawmakers actually want to discourage more investment. What a nice problem to have.

Describing Zug’s development as “astonishing,” Matthias Michel, the head of the canton government, said, “We are too small for the success we have had.” …Zug has largely stopped trying to lure more multinationals, according to Mr. Michel.

…the Swiss are mostly holding fast to their fiscal beliefs. Last November, in a national referendum, they overwhelmingly rejected a proposal that would have established a minimum 22% tax rate on incomes over 250,000 francs, or about $315,000.